P7s are fast but lack magazine capacity unless you can get your hand around a P7M13. Also expensive.
USPs and their plastic derivatives have tough triggers, said not to be very ameniable to gunsmithing.

There are some, so if you have a H&K, come on down. It can do the job if you can.

Once upon a time, P7M8s competed in SSP, and were thought to be the "gamer" set-up. When they moved them to ESP, they became less competitive because of capacity, so they were used less frequently.
Besides, they are expensive.

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